【教えて下さい】「benevolent　skin cancer」の意味

In addition, the cancers include breast cancer, ovarian cancer, kidney cancer, liver cancer, uterine cancer or skin cancer.
また癌が、乳癌、卵巣癌、腎臓癌、肝癌、子宮癌又は皮膚癌である。
http://ejje.weblio.jp/sentence/content/skin+cancer